So you are probably thinking....."I'm not that good of a gamer but i love open world action RPG's." Or more likely you are thinking "I like a cahllenge but sometimes complete domination takes a while." Well this is for you.
Step1. go to settings and find the maximum battle size, turn that to the minium. Then turn up the damage you deal and turn down the damage you and your allies recieve. Turn combat to slow and AI top poor. Now advanced gamers may only need to turn down the battle cap and keep the difficulties.

Now lets say you just started what you want to do is as fast as you can get denars. Hunt down tournaments and fight in them, betting on yourself. As fast as you can get more party members( perferably calvary since they are the best units). While levelling up pick one faction to help, just one, only one ally, when allocating skill points upon levilling put them into leadership or charisma to increase your leadership cap. Once you have a max parety size of fourty or fifty fill that party to the brim. Let's say you encouter a party of eighty, well now with your low battle cap you and your most elite troops will battle. Let's say you kill a dosen and your men do the rest, rinse and repeat until your foe is routed. But the big thing is now go to any of your enemies villages (If your faction isnt in a war pick only one faction to piss off) select the option "take a hostile action" then select "loot and raze the village" with this big of a party you shouldn't meet an resistence it will take a day but then you will get about 3000 to 5000 denars worth of loot to sell. Your party also can gain morale. The only downside is a faction leader of the village you are raiding can attempt to stop you, which rarely happens since they have to be right by you..... and care. So many times they just walk right past me. Keep making more trips get more money,weapons, armor, and a bigger better and stronger army. Now you'll level up all the while levelling your enemies villages and destroying their economy.

Another thin you can to is besiege a castle in a fifty v. 100 and win with all this combined (I choose khergate Khanate) I instantly became a powerful jarl and vassal. I had doubled the size of our land, owned 2 castles and one city, had +100 relationship with my faction, had 30,000 denars, THE BEST bow in the game, some of the best armor, level 32, a one hundred + army of highly trained calvary in 25 hrs!! I know what you are thinking "25 hrs?" those of you who've played mount and blade know that some of the best players that would take atleast 50 + hours.